[incubator/kafka] adding an explicit selector to the kafka statefulset (#14876)

* adding an explicit selector to the kafka statefulset

Signed-off-by: Kealan Murphy <kealan.murphy@aspect.com>

* bumping chart version

Signed-off-by: Kealan Murphy <kealan.murphy@aspect.com>

incubator/kafka/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 description: Apache Kafka is publish-subscribe messaging rethought as a distributed
   commit log.
 name: kafka
-version: 0.15.8
+version: 0.16.0
 appVersion: 5.0.1
 keywords:
 - kafka

incubator/kafka/templates/statefulset.yaml

@@ -9,6 +9,10 @@ metadata:
     release: {{ .Release.Name }}
     heritage: {{ .Release.Service }}
 spec:
+  selector:
+    matchLabels:
+      app: {{ include "kafka.name" . }}
+      release: {{ .Release.Name }}
   serviceName: {{ include "kafka.fullname" . }}-headless
   podManagementPolicy: {{ .Values.podManagementPolicy }}
   updateStrategy: